. Fossil plants : for students of botany and geology . Paleobotany. 516 CYCADOPHYTAN FRONDS [CH. heusive species should be included the specimens described by Feistmantel as Otozamites Hislopi (fig. 589), 0. angustatus, and 0. gracilis. It may well be that a more detailed investigation of the numerous forms comprised in this protean species, parti- cularly if specimens are obtained from which cuticular pre- parations can be made, may lead to the recognition of additional species or well-defined varieties. The resemblance between the. Fig. 589. Ptilophyllum pecten. A frond figured by Feistmante
. Fossil plants : for students of botany and geology . Paleobotany. 516 CYCADOPHYTAN FRONDS [CH. heusive species should be included the specimens described by Feistmantel as Otozamites Hislopi (fig. 589), 0. angustatus, and 0. gracilis. It may well be that a more detailed investigation of the numerous forms comprised in this protean species, parti- cularly if specimens are obtained from which cuticular pre- parations can be made, may lead to the recognition of additional species or well-defined varieties. The resemblance between the. Fig. 589. Ptilophyllum pecten. A frond figured by Feistmantel as Otozamites Hislopi. A, f nat. size; B, enlarged (Calcutta Museum). various forms of P pecten from the Jurassic strata of Yorkshire and those of P. cutchense from India is very striking, and at least in many cases no specific separation is possible so far at least as the form of the fronds and pinnae is concerned. The occasional close association of Ptilophyllum fronds and Williamsonia flowers is an important agreement between the English and Indian fronds (fig. 590). In the first part of tha Catalogue of Jurassic plants from York-'. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishercambr, bookyear1898
